For me, there was the ATH bubble, the November 2015 and the June 2016. I wasn't aware of the other ones, as him probably.
The June 2011 bubble was the granddaddy of all Bitcoin bubbles. It was perhaps a defining moment in Bitcoin being taken seriously. After finally achieving parity with the USD a few months earlier, its rapid ascent to over $30 opened a few eyes.
The April 2013 bubble was pretty big too. After the 2011 bubble deflated and over a year was spent in $5-10 limbo, Bitcoin came roaring back with a vengeance. Now we knew it wasn't a one hit wonder. Sure enough, by November it had done it again, this time to a new (and current) ATH.